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diff --git a/sprites.py b/sprites.py
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-# -*- coding: utf-8 -*-
-
-#Copyright (c) 2007-8, Playful Invention Company.
-#Copyright (c) 2008-10 Walter Bender
-
-#Permission is hereby granted, free of charge, to any person obtaining a copy
-#of this software and associated documentation files (the "Software"), to deal
-#in the Software without restriction, including without limitation the rights
-#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-#copies of the Software, and to permit persons to whom the Software is
-#furnished to do so, subject to the following conditions:
-
-#The above copyright notice and this permission notice shall be included in
-#all copies or substantial portions of the Software.
-
-#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-#THE SOFTWARE.
-
-"""
-
-sprites.py is a simple sprites library for managing graphics objects,
-'sprites', on a canvas. It manages multiple sprites with methods such
-as move, hide, set_layer, etc.
-
-There are two classes:
-
-class Sprites maintains a collection of sprites.
-class Sprite manages individual sprites within the collection.
-
-Example usage:
-        # Import the classes into your program.
-        from sprites import Sprites Sprite
-
-        # In your expose callback event handler, call refresh
-        def _expose_cb(self, win, event):
-            self.sprite_list.refresh(event)
-            return True
-
-        # Create a new sprite collection for a gtk Drawing Area.
-        my_drawing_area = gtk.DrawingArea()
-        self.sprite_list = Sprites(my_drawing_area)
-
-        # Create a "pixbuf" (in this example, from SVG).
-        my_pixbuf = svg_str_to_pixbuf("<svg>...some svg code...</svg>")
-
-        # Create a sprite at position x1, y1.
-        my_sprite = sprites.Sprite(self.sprite_list, x1, y1, my_pixbuf)
-
-        # Move the sprite to a new position.
-        my_sprite.move((x1+dx, y1+dy))
-
-        # Create another "pixbuf".
-        your_pixbuf = svg_str_to_pixbuf("<svg>...some svg code...</svg>")
-
-        # Create a sprite at position x2, y2.
-        your_sprite = sprites.Sprite(self.sprite_list, x2, y2, my_pixbuf)
-
-        # Assign the sprites to layers.
-        # In this example, your_sprite will be on top of my_sprite.
-        my_sprite.set_layer(100)
-        your_sprite.set_layer(200)
-
-        # Now put my_sprite on top of your_sprite.
-        my_sprite.set_layer(300)
-
-# method for converting SVG to a gtk pixbuf
-def svg_str_to_pixbuf(svg_string):
-    pl = gtk.gdk.PixbufLoader('svg')
-    pl.write(svg_string)
-    pl.close()
-    pixbuf = pl.get_pixbuf()
-    return pixbuf
-"""
-
-import pygtk
-pygtk.require('2.0')
-import gtk
-import pango
-
-
-class Sprites:
-    """ A class for the list of sprites and everything they share in common """
-
-    def __init__(self, canvas, area=None, gc=None):
-        """ Initialize an empty array of sprites """
-        self.canvas = canvas
-        if area == None:
-            self.area = self.canvas.window
-            self.gc = self.area.new_gc()
-        else:
-            self.area = area
-            self.gc = gc
-        self.cm = self.gc.get_colormap()
-        self.list = []
-
-    def get_sprite(self, i):
-        """ Return a sprint from the array """
-        if i < 0 or i > len(self.list)-1:
-            return(None)
-        else:
-            return(self.list[i])
-
-    def length_of_list(self):
-        """ How many sprites are there? """
-        return(len(self.list))
-
-    def append_to_list(self, spr):
-        """ Append a new sprite to the end of the list. """
-        self.list.append(spr)
-
-    def insert_in_list(self, spr, i):
-        """ Insert a sprite at position i. """
-        if i < 0:
-            self.list.insert(0, spr)
-        elif i > len(self.list) - 1:
-            self.list.append(spr)
-        else:
-            self.list.insert(i, spr)
-
-    def remove_from_list(self, spr):
-        """ Remove a sprite from the list. """
-        if spr in self.list:
-            self.list.remove(spr)
-
-    def find_sprite(self, pos):
-        """ Search based on (x, y) position. Return the 'top/first' one. """
-        list = self.list[:]
-        list.reverse()
-        for spr in list:
-            if spr.hit(pos):
-                return spr
-        return None
-
-    def refresh(self, event):
-        """ Handle expose event refresh """
-        self.redraw_sprites(event.area)
-
-    def redraw_sprites(self, area=None):
-        """ Redraw the sprites that intersect area. """
-        for spr in self.list:
-            if area == None:
-                spr.draw()
-            else:
-                intersection = spr.rect.intersect(area)
-                if intersection.width > 0 or intersection.height > 0:
-                    spr.draw()
-
-
-class Sprite:
-    """ A class for the individual sprites """
-
-    def __init__(self, sprites, x, y, image):
-        """ Initialize an individual sprite """
-        self._sprites = sprites
-        self.rect = gtk.gdk.Rectangle(int(x), int(y), 0, 0)
-        self._scale = [12]
-        self._rescale = [True]
-        self._horiz_align = ["center"]
-        self._vert_align = ["middle"]
-        self._fd = None
-        self._bold = False
-        self._italic = False
-        self._color = None
-        self._margins = [0, 0, 0, 0]
-        self.layer = 100
-        self.labels = []
-        self.images = []
-        self._dx = []  # image offsets
-        self._dy = []
-        self.set_image(image)
-        if self._sprites is not None:
-            self._sprites.append_to_list(self)
-
-    def set_image(self, image, i=0, dx=0, dy=0):
-        """ Add an image to the sprite. """
-        while len(self.images) < i + 1:
-            self.images.append(None)
-            self._dx.append(0)
-            self._dy.append(0)
-        self.images[i] = image
-        self._dx[i] = dx
-        self._dy[i] = dy
-        if isinstance(self.images[i], gtk.gdk.Pixbuf):
-            w = self.images[i].get_width()
-            h = self.images[i].get_height()
-        else:
-            w, h = self.images[i].get_size()
-        if i == 0:  # Always reset width and height when base image changes.
-            self.rect.width = w + dx
-            self.rect.height = h + dy
-        else:
-            if w + dx > self.rect.width:
-                self.rect.width = w + dx
-            if h + dy > self.rect.height:
-                self.rect.height = h + dy
-
-    def move(self, pos):
-        """ Move to new (x, y) position """
-        self.inval()
-        self.rect.x, self.rect.y = int(pos[0]), int(pos[1])
-        self.inval()
-
-    def move_relative(self, pos):
-        """ Move to new (x+dx, y+dy) position """
-        self.inval()
-        self.rect.x += int(pos[0])
-        self.rect.y += int(pos[1])
-        self.inval()
-
-    def get_xy(self):
-        """ Return current (x, y) position """
-        return (self.rect.x, self.rect.y)
-
-    def get_dimensions(self):
-        """ Return current size """
-        return (self.rect.width, self.rect.height)
-
-    def get_layer(self):
-        """ Return current layer """
-        return self.layer
-
-    def set_shape(self, image, i=0):
-        """ Set the current image associated with the sprite """
-        self.inval()
-        self.set_image(image, i)
-        self.inval()
-
-    def set_layer(self, layer):
-        """ Set the layer for a sprite """
-        if self._sprites is None:
-            return
-        self._sprites.remove_from_list(self)
-        self.layer = layer
-        for i in range(self._sprites.length_of_list()):
-            if layer < self._sprites.get_sprite(i).layer:
-                self._sprites.insert_in_list(self, i)
-                self.inval()
-                return
-        self._sprites.append_to_list(self)
-        self.inval()
-
-    def set_label(self, new_label, i=0):
-        """ Set the label drawn on the sprite """
-        self._extend_labels_array(i)
-        if type(new_label) is str or type(new_label) is unicode:
-            # pango doesn't like nulls
-            self.labels[i] = new_label.replace("\0", " ")
-        else:
-            self.labels[i] = str(new_label)
-        self.inval()
-
-    def set_margins(self, l=0, t=0, r=0, b=0):
-        """ Set the margins for drawing the label """
-        self._margins = [l, t, r, b]
-
-    def _extend_labels_array(self, i):
-        """ Append to the labels attribute list """
-        if self._fd is None:
-            self.set_font('Sans')
-        if self._color is None:
-            self._color = self._sprites.cm.alloc_color('black')
-        while len(self.labels) < i + 1:
-            self.labels.append(" ")
-            self._scale.append(self._scale[0])
-            self._rescale.append(self._rescale[0])
-            self._horiz_align.append(self._horiz_align[0])
-            self._vert_align.append(self._vert_align[0])
-
-    def set_font(self, font):
-        """ Set the font for a label """
-        self._fd = pango.FontDescription(font)
-
-    def set_label_color(self, rgb):
-        """ Set the font color for a label """
-        self._color = self._sprites.cm.alloc_color(rgb)
-
-    def set_label_attributes(self, scale, rescale=True, horiz_align="center",
-                             vert_align="middle", i=0):
-        """ Set the various label attributes """
-        self._extend_labels_array(i)
-        self._scale[i] = scale
-        self._rescale[i] = rescale
-        self._horiz_align[i] = horiz_align
-        self._vert_align[i] = vert_align
-
-    def hide(self):
-        """ Hide a sprite """
-        if self._sprites is None:
-            return
-        self.inval()
-        self._sprites.remove_from_list(self)
-
-    def inval(self):
-        """ Force a region redraw by gtk """
-        if self._sprites is None:
-            return
-        self._sprites.area.invalidate_rect(self.rect, False)
-
-    def draw(self):
-        """ Draw the sprite (and label) """
-        if self._sprites is None:
-            return
-        for i, img in enumerate(self.images):
-            if isinstance(img, gtk.gdk.Pixbuf):
-                self._sprites.area.draw_pixbuf(self._sprites.gc, img, 0, 0,
-                                               self.rect.x + self._dx[i],
-                                               self.rect.y + self._dy[i])
-            elif img is not None:
-                self._sprites.area.draw_drawable(self._sprites.gc, img, 0, 0,
-                                                 self.rect.x + self._dx[i],
-                                                 self.rect.y + self._dy[i],
-                                                 -1, -1)
-        if len(self.labels) > 0:
-            self.draw_label()
-
-    def hit(self, pos):
-        """ Is (x, y) on top of the sprite? """
-        x, y = pos
-        if x < self.rect.x:
-            return False
-        if x > self.rect.x + self.rect.width:
-            return False
-        if y < self.rect.y:
-            return False
-        if y > self.rect.y + self.rect.height:
-            return False
-        return True
-
-    def draw_label(self):
-        """ Draw the label based on its attributes """
-        if self._sprites is None:
-            return
-        my_width = self.rect.width - self._margins[0] - self._margins[2]
-        if my_width < 0:
-            my_width = 0
-        my_height = self.rect.height - self._margins[1] - self._margins[3]
-        for i in range(len(self.labels)):
-            pl = self._sprites.canvas.create_pango_layout(str(self.labels[i]))
-            self._fd.set_size(int(self._scale[i] * pango.SCALE))
-            pl.set_font_description(self._fd)
-            w = pl.get_size()[0] / pango.SCALE
-            if w > my_width:
-                if self._rescale[i]:
-                    self._fd.set_size(
-                            int(self._scale[i] * pango.SCALE * my_width / w))
-                    pl.set_font_description(self._fd)
-                    w = pl.get_size()[0] / pango.SCALE
-                else:
-                    j = len(self.labels[i]) - 1
-                    while(w > my_width and j > 0):
-                        pl = self._sprites.canvas.create_pango_layout(
-                              "…" + self.labels[i][len(self.labels[i]) - j:])
-                        self._fd.set_size(int(self._scale[i] * pango.SCALE))
-                        pl.set_font_description(self._fd)
-                        w = pl.get_size()[0] / pango.SCALE
-                        j -= 1
-            if self._horiz_align[i] == "center":
-                x = int(self.rect.x + self._margins[0] + (my_width - w) / 2)
-            elif self._horiz_align[i] == 'left':
-                x = int(self.rect.x + self._margins[0])
-            else: # right
-                x = int(self.rect.x + self.rect.width - w - self._margins[2])
-            h = pl.get_size()[1] / pango.SCALE
-            if self._vert_align[i] == "middle":
-                y = int(self.rect.y + self._margins[1] + (my_height - h) / 2)
-            elif self._vert_align[i] == "top":
-                y = int(self.rect.y + self._margins[1])
-            else: # bottom
-                y = int(self.rect.y + self.rect.height - h - self._margins[3])
-            self._sprites.gc.set_foreground(self._color)
-            self._sprites.area.draw_layout(self._sprites.gc, x, y, pl)
-
-    def label_width(self):
-        """ Calculate the width of a label """
-        max = 0
-        for i in range(len(self.labels)):
-            pl = self._sprites.canvas.create_pango_layout(self.labels[i])
-            self._fd.set_size(int(self._scale[i] * pango.SCALE))
-            pl.set_font_description(self._fd)
-            w = pl.get_size()[0] / pango.SCALE
-            if w > max:
-                max = w
-        return max
-
-    def label_safe_width(self):
-        """ Return maximum width for a label """
-        return self.rect.width - self._margins[0] - self._margins[2]
-
-    def label_safe_height(self):
-        """ Return maximum height for a label """
-        return self.rect.height - self._margins[1] - self._margins[3]
-
-    def label_left_top(self):
-        """ Return the upper-left corner of the label safe zone """
-        return(self._margins[0], self._margins[1])
-
-    def get_pixel(self, pos, i=0):
-        """ Return the pixl at (x, y) """
-        x, y = pos
-        x = x - self.rect.x
-        y = y - self.rect.y
-        if y > self.images[i].get_height() - 1:
-            return(-1, -1, -1, -1)
-        try:
-            array = self.images[i].get_pixels()
-            if array is not None:
-                offset = (y * self.images[i].get_width() + x) * 4
-                r, g, b, a = ord(array[offset]), ord(array[offset + 1]),\
-                             ord(array[offset + 2]), ord(array[offset + 3])
-                return(r, g, b, a)
-            else:
-                return(-1, -1, -1, -1)
-        except IndexError:
-            print "Index Error: %d %d" % (len(array), offset)
-            return(-1, -1, -1, -1)